Adjustable tap and die



, Sept. 2 1924.

- T. J. Down ADJUSTABLE TAP AND DIE Filed Aug. 31 l922 2 Shasta-Sheet l HIIIIIIIIHIE [lll/lll l JMJ IIIIIIIIII Elim Sept. 2 1924.

T. J. DOWD ADJUSTABLE TAP AND D15 Filed Aug. 31 1922 2 Shoots-5h90! 2 Patented Sept. 2, 1924.

UNITED sTifrlQSv ATHCOJSLIAS Jr DOWD, 0F NEW YORK, N. Y.

ADJUSTABLE TAP AND DE.

Application filed August 31, 19232;" Serial No. 585,395.

To all lwhom t may concern.' Y Y Be it known that I, THOMAS J. Down, a' citizen ofthe United States, residing at New York, in the county of NewYork and State of New York, have invented certain new and useful Improvements in an Adjustable Tap and Die; and I do hereby declare the following to be a full, clear, and 'exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The obj ect of the invention is t-opro-vide a convertible tap and die of which the bit de-l signed for jointy action upon the object to be threaded internally or externally may be adjusted simultaneously and accurately within a relatively wide range of movement; and with this object in view the invention consists in a construction, and relation of parts of which a preferred embodiment is' illustrated in the accompanying drawing, where- 1n:

Figure l is a side view partly broken away of a tool embodyingthe invention with the parts arranged as a tap,

Figure 2 is a plan view of the same,

Figure 3 is a reverse or bottom plan View thereof,

Figure 4 is a transverse or axial sectional View thereof, Y

'Figure 5 is a plan view with the upper retainer disk omitted,

Figure 6 is a section on the plane indicated by the line 6 6 of Figure 4, ,a

Figures 'T and 8 are detail views of the members of one of the tapping bits,

Figures 9 and l0 are respectivelyplan and side views of the tool arranged for use as a die, c Y Figures 11 and 12 are sectional views respectively on the planes indicated by the line 11-11 of Figure 10 and 12-12 of Figure 9,

Figure 13 is a detail view of one ofthe die bits, j

Figure 14 is a detail sectional View on the plane indicated by the line 14-.-14 of yFigure 2. i

The tool consists essentially of an annular head or body 20 provided with radially extending operatingarms 21 and carrying bit Shanks which, in the adjustment of the elements indicated in Figures 41 to 6 inclusivey are shown at 22 and areV tted in radial guides 23 with their innerends projecting intothe central opening of the head or body to carry cutter heads which inthe arrangementV Vshown igures 1 to 6 are indicated at 24 andv consist 'of toothed bars which eX,` tend in aV direction parallel with the axis of thek head and are movable by ,the Shanks toward and from the vaxis of the head within a range of movement determined by the radius of the opening therein.' n

These bit Shanks are provided with racks 25 with which mesh pinions 26 mounted in the head with their axes parallel with the axis of thehead, and they are simultaneouslyv actuable to cause a mutual and equal adjust'- I ment rinwardly or outwardly ofthe bit shanks by means of a revoluble adjusting ring'27 mounted upon and'parallel with the head inv coaxial alignment ltherewith and provided with an exterior milled periphery which projects suiiiciently beyond the periphery rof the head to be engaged by the iingers of the operatorin etiecting'thev adjustment vof thelshanks. The pinions are i held in place in the'terminally open bearings in the head or body by means of opposite lower and upper retaining disks 28 and 29 so secured in place by retaining screws 30 which pass through the head or body, a cross sectionally angular' Ibushing 31 being fitted in the upper orouter retaining disk as shown clearly in Figure 4 to aiford a bearing space for the adjusting ring k27v which surrounds the body portion thereof. By the removal ofthe lower retaining disk as will be obvious the pinions may be displaced. The upper retaining disk is provided 4withfan in-l dex notch 31T with whichcooperates a graduated scale 32 on 'the adjusting ring as a means of indicating the position ofthe bits controlled byv the said ring andas a guide to theoperator in setting the. bits, and to secure the adjusting ring in its adjusted positions there is employed the set screw 33 carried by the upper retainer. j

' In the form of the tool which is designed particularly for tapping work thebody portion of the head preferablyconsists of the main disks 34, fromvwhich project the operating arms 21, Yand a supplemental disk 35, preferably keyed together by al pin 36l carried by one of said disks (preferably the supplemental vdisk as shown) and the b it shank 22 issupplernented by an auxiliary blt shank 22 operating in a guide'37 inthe supplemental disk and provided at its inner end with a sleeve 24 grooved to receive the pinionfs 26) "and the .former of Which carries tjli'ey cutter 24 nested in the protective sleeve` itis preferredto employ reversely disposed conical spreader-s 39 and 40 tted betvveen the tapping bbits at the upper and .levier `or ou'terand inner ends of the cutting elements thereof and connected by a threadu'stingr'od A'il'havi'ng' a' terminal milled head'Z and engaged by a'nut 43,the conical surfaces olf these spreaders beinglongitul.g'roovk'e d Vasshovvn respectively at 39% l-"Oj"- to seat the adjacent ends of the oiittiiigielements of the bits to prevent vibration't'hereof'in theoperation of the tool. i

)"In'the Vadjustment ot the members of the tool to Iadapt *it to lperform the functions of a threadV cutting die, as indicated in Figures 9 .to l'linclu'sive, the auxiliary body disk ot thel headispreterably omitted andthe head consists' of' the4 single disk'e, corresponding ivth'and in tact being the same disk as that designated B2i in the vadjustment indicated in Figures l to'6 inclusive, and carrying the operating arms 21a, the bit shanks 22a which are vprovided "at 'their 'inner ends With 'the die-,cutters 2li having therack teeth 25a for engagement'by pinions'26a engaged as previoi'i'sfl'y. .described `by the adjusting ring 27a having' vinternalgear teeth and being in embracing relation Withthe bushing 3l, asso# ciatedavith the inner andl outer retainer disks'28fand29a secured together by the re-V taniingzs'rews' aoa'.'

A".'lie tool .as shown in Figures l to o' of the'dravvingsisset'for operation as ya tap, upon the 'la"rgest Work upon which the tool may ,be used. VvTo set the tool for use as a for operation on a small job,the cones 39. and l40 are moved apart by operating the screw .41 and the bit shank 22y and cutter head carried thereby may lthen be moved toyvard the axis of the head -the required distance, by rotating revoluble adjusting ring'zr27 which turns vthe pinions 26v in mesh j the racks 25r provided on the bit slianks 22. lVhen the .bit shanks and cutter heads have been adjusted, the cone blocks 39 ,and LO may be moved to and 'locked in alpositio-n to engage the outer terminals of the .cutter heads and brace the same. The auxiliary bit Shanks 22. and the sleeves 24 are :moved simultaneously With vthe bit Shanks ,22 and the cutter heads 2li. /Vlien the tool is assembled foruse as aV die as shown in Figures 9 to 12, the bit Shanks 22ak may be .adjusted toward or away from the axis oft the head or disk 34a by rotating the revoluble adjusting ring 27a iny a counter clockwisepr in areclockwise direction. The bitl shanks 22a and'part carried thereby are adjusted to'vvard the axis of the head 34 by movement of the ring 27a in a counter clockvvise direction and are moved away from the axis ot the head by movement of thering 27 ina clockwise direction. The tool may be rotated by :grasping and turning the handle members 21 or 21a laccori'iing to 'the Vformer vtool being'used lt will be obviousV that the conversion of the tool from a tap to `a die can be effected readily, merely upon the loosening 'of lthe retaining screws which serve asthe means for 'securing lthe retainer disks" in vtheir proper positions and which in turn yholdthe intermediate elements 'of 'the 'structure in their proper relations, and that ra variety ot Abits adapted vfor ditferent purposes and.

designed to form threads of different pitch and gage may be interchangeably `used in this connection. 'i

It will further be l` un'derstood l'that 'the tool is susceptible of a Widerange of modiiica't-ion inthe matter ot dimensions and particularly of the diameterfof the heady and the opening therein to? adord -a range of movement oi' the bit cutters. i Having thus described the invention, what I claim'is:-

l. threading tool having :an annular headV provided with radialy guides, bit shanks fitted in the guides andhavinglrack teeth, said bit Shanks carrying tapping cutter bars extending parallel Withthe'axis of the head, pinions mounted iin* lthe head in mesh ivith; the rack teeth of the 'bit Shanks, and a revoluble adjusting member mounted upon the head for communicati-'n simultaneous rotary movement *to sai'.- pinions.

2. A threading tool having an annular head provided with radial guides, bitr Shanks fitted in the guides andhavingrackteeth, said bit Shanks carrying tapping cutter bars extending yparallel Awith theaxis of the head, pinions mounted Ainthe head in axial perpen'dicularity"to the paths of the Shanks andv meshing with the 'racksthereon rand a revoluble adjusting ring mounted on Cthe head in mutual meshing-relation with said pinions. Y

3. A threading tool having an ann nular head Vprovided #with "radial Vguides, bit. Shanks Atitte-d in"th`e guides and having rack teeth," said bitwshanks carrying tapping cutter ybars extendingparallel with "the axis of `the head, pinions mounted'in the head axial perpendi'cularity to kthepaths ot the Shanks and meshing With the racks thereof, 'and an internallyv toothed adjusting ring mounted upon the head in axial parallelism with the pinions and meshing mutually therewith.

4. A thread cutting tool having a head consisting Vof a body disk provided with radial operating arms and oppositely disposed retainerldisks connected by retaining Screws extending through the body disk, bit

Shanks iitted in radial 'guides in the body disk Aand provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, said pinions being terminally confined by the retainer disks, and a common adjusting ring revolubly mounted upon the head in interna-l meshing relation mutually with said pinions for effecting simultaneous adjustments of the bit Shanks.

- 5. A thread cutting tool having a head consisting of a body disk pro-vided with radial operating arms and oppositely disposed retainer disks connected by retaining screws extending through the body disk, bit Shanks fitted in radial guides in the body disk and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, said pinions being terminally conned by the retainer disks, anda common adjust-ing ring revolubly mounted upon the head in internal meshing relation mutuallyv with said pinions for effecting simultaneous adjustments of the bit Shanks, tapping cutter bars being carried by the inner end of the bit Shanks in parallelism with the axis of the head. i

6. A thread cutting tool having a head consisting of a body disk provided with radial operating arms and oppositely disposed retainer disks connected by retaining screws extending through the body disk, bit Shanks itted in radial guides in the body disk and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, sai-d pinions being terminally confined by the retainer disks, and a common adjusting ring revolubly mounted upon the head in internal meshing relation mutually with said pinions for effecting simultaneous adjustments of the bit Shanks, tapping cutter bars being car-y ried by the inner ends of the bit Shanks, in combination with supplemental bit Shanks actuable by said pinions and having sleeves for housing said cutter bars.

7 A thread cutting tool having a head consisting of a body disk provided with radial operating arms and oppositely dis-v posed retainer disks connected by retaining screws extending through the body diskl bit Shanks fitted in radial guides in the body disk and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, Said pinions being terminally confined by the retainer disks, and a common adjusting ring revolubly mounted upon the head in internal meshing relation mutually with said pinions for eiecting simultaneous adjustments of the bit Shanks, tapping cutter bars being carried bythe inner ends of the bit Shanks, in combination with supplemental bit Shanks actuable by said pinions and having sleeves for housing said cutter bars, said sleeves having beveled outer edges for exposing the cutting faces of said bars.

8;-A thread cutting tool having a head consisting of a body disk provided with radial operating armsv and oppositely disposed retainer disks connected by retaining screws extend-ing through the body disk, bit Shanks fitted in radial guides in the body disk and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, said pinions being terminally confined by the retainer disks, and a common adjusting ring revolubly mounted upon the head in internal meshing relation mutually withV said pinions for eiecting.simultaneous adjustments of the bit-Shanks, the inner ends of the bit Shanks being provided with cutter bars disposed in parallelism with the axis of the l head, in combination with an auxiliarybody disk, and-Shanks mounted in radial guides in Said auxiliary disk and 4provided with rackv teeth meshing lwith said pinions, thel i inner ends' of' the auxiliary Shanks .being ions being terminally confined by the retainer disks, and a common adjusting ring revolubly mounted upon the head in internal mesh-A ing relation mutually with said pinions for effecting simultaneous adjustments of the bit Shanks, said bit Shanks carrying tapping v cutter bars extending parallel with the axis of the head, in combination with reinforcing means consisting of oppositely directed conical spreaders interposed between opposite ends of the cutter bars and connected by an adjusting rod.

10. A thread cutting tool having a head consisting of a body disk provided with ra dial operating arms and oppositely disposed retainer disks connected by retainer screws extendino throuo'h the bod disk, bit Shanks b C g fitted in radial guides in t e body disk and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racksvot the shanks,A said pinions being terminali;7 eonned bythe retainer disks, and a common adjusting ring revolubly mounted upon the head in internal meshing relation mutually,vv with said pinions for effecting siniultaneous adjustments of the bit Shanks, said bit Shanks carrying tapping cutter baars extending parallel with vthe axis oit the head, in combination with reinforcing means consisting of oppositely directed conical spneaders interposed between opposite ends of the Cutter bars and connected by an adjusting rod, said rod being provided at one end with a milled head and being engaged yby a lock nut.

il. A thread cutting -tool having -a head consisting ot' a body disk provided With radial operating arms and oppositely disposed retainer disks connected by retaining screws extending through the body disk,-bit Shanks fitted in radial guides in the body disp: and provided with rack teeth, pinions mounted in openings in the body disk and in mesh with the racks of the Shanks, said pinions being .terminally confined by the retainer disks, and a common adjusting ring revolub'lv mounted upon the head in internal meshing relation mutually7 with said pinions -for effectingsimultaneous adjustments of thebit Shanks, said bit Shanks carrying tapping cutter bars extending parallel with the axis of the head, 4in combination with reintorcing means consisting of oppositebT directed conical spreaders vinterposed between .opposite ends of the cutter bars and connectedbyan adjusting rod, said spreaders being pro- :Leonesa carrying Shanks lcarrying'itapjping cutterl bars, a revoluble ,adjust-ing member mounted onthe head, and nieanswtor communicating c seating .the extremities vof said,

motion 'tronisaid member -tofthe-bit shank, p

in Leombination with reinforcing means c011- sisting .ont opiposiitebly dinected. conical spread ers interposedbetween opposite ends of the cutter bars and connected by adjusting rod.

13. "A threading tool having an annular head provided with radial guides, bit Shanks fitted in the guides, said'bit Shanks carrying tapping cutter bars extending parallel with the axis :the head, a revoluble adjusting member mounted on Vthe head, and means tor commimieating motion from said mem-v ber to :the Jbit Shanks, `in:combination with reinforcing meansoonsisting oit Oppositely directed conical sp-readers interposed between opposite Vends of the cutter `bars and .connected rb'y adj Listing rod, said spreaders being Apr mided -ivith iside longitudinally dis pesedchannels for receiving :the extremities oft said cutter bars. f

In testimony Whereozf I a; my signature in presence ott two Witnesses.

- THGMAS J. DOYVD.

Vitnesses: g e

' QOHN in. `lBfYRNE,

BENNETT S. JONES. 

